Apache James vs Cyrus IMAP
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Apache James
Enterprise mail server and SMTP/IMAP platform
VS
Cyrus IMAP
Scalable IMAP and POP server for large deployments
| Feature | Apache James | Cyrus IMAP |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | Apache-2.0 | BSD-3-Clause |
| Language | Java | C |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 1,024 MB |
| Deployment | docker, source | bare-metal, source |
| GitHub stars | ★ 1,037 | ★ 641 |
| First released | 2003 | 1994 |
| Replaces | Microsoft Exchange | Microsoft Exchange |
Why pick each one
Choose Apache James if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Active community (1k GitHub stars)
- Written in Java
Frequently asked questions
Is Apache James or Cyrus IMAP better?
Neither is universally better. Apache James has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Apache James and Cyrus IMAP free and open-source?
Yes. Apache James is licensed under Apache-2.0 and Cyrus IMAP under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run Apache James and Cyrus IMAP with Docker?
Apache James: yes. Cyrus IMAP: check the project docs for container support.